1 /*
2 * Copyright 2018 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include <keymaster/km_openssl/triple_des_key.h>
18
19 #include <assert.h>
20
21 #include <openssl/err.h>
22 #include <openssl/rand.h>
23
24 #include "triple_des_operation.h"
25
26 namespace keymaster {
27
28 static TripleDesOperationFactory encrypt_factory(KM_PURPOSE_ENCRYPT);
29 static TripleDesOperationFactory decrypt_factory(KM_PURPOSE_DECRYPT);
30
GetOperationFactory(keymaster_purpose_t purpose) const31 OperationFactory* TripleDesKeyFactory::GetOperationFactory(keymaster_purpose_t purpose) const {
32 switch (purpose) {
33 case KM_PURPOSE_ENCRYPT:
34 return &encrypt_factory;
35 case KM_PURPOSE_DECRYPT:
36 return &decrypt_factory;
37 default:
38 return nullptr;
39 }
40 }
41
LoadKey(KeymasterKeyBlob && key_material,const AuthorizationSet &,AuthorizationSet && hw_enforced,AuthorizationSet && sw_enforced,UniquePtr<Key> * key) const42 keymaster_error_t TripleDesKeyFactory::LoadKey(KeymasterKeyBlob&& key_material,
43 const AuthorizationSet& /* additional_params */,
44 AuthorizationSet&& hw_enforced,
45 AuthorizationSet&& sw_enforced,
46 UniquePtr<Key>* key) const {
47 if (!key) return KM_ERROR_OUTPUT_PARAMETER_NULL;
48
49 keymaster_error_t error = KM_ERROR_OK;
50 key->reset(new (std::nothrow)
51 TripleDesKey(move(key_material), move(hw_enforced), move(sw_enforced), this));
52 if (!key->get()) error = KM_ERROR_MEMORY_ALLOCATION_FAILED;
53 return error;
54 }
55
validate_algorithm_specific_new_key_params(const AuthorizationSet & key_description) const56 keymaster_error_t TripleDesKeyFactory::validate_algorithm_specific_new_key_params(
57 const AuthorizationSet& key_description) const {
58 if (key_description.Contains(TAG_MIN_MAC_LENGTH)) return KM_ERROR_INVALID_TAG;
59 return KM_ERROR_OK;
60 }
61
62 } // namespace keymaster
63